When there are no distinctive coastal features available, you can determine your approximate surface position by using a sighting compass.

Use a compass that is waterproof and designed for marine use.

1. Select one visible landmark on the coastline (for example, a palm tree) and take a compass bearing. <Figure 1>

2. Select a second visible landmark (for example, a hotel building) and take another compass bearing. <Figure 2>

3. Plot the two bearing lines. The intersection of these lines determines your approximate surface position.

For greater accuracy, ensure that the two bearing lines intersect as close to a right angle as possible.